propeller blades

Hello ! I was wondering if someone knew the Olympic's exact position (in degrees) in the North Atlantic when she lost a propeller blade on February 24, 1912 ? According to this site, the collision occured about 750 miles off the Newfoundland coast. This is the only information I have...

So after watching a couple snippets of James Cameron's Titanic I found an interesting line said by an extra that goes a little something like this... First Class Female Passenger: I felt a shudder, is everything alright? Butler: Nothing to worry about Miss, we've likely just thrown a Propeller...

The collision with the iceberg was described as a "jar" followed by a long vibration. Quartermaster Rowe thought they were going full speed astern and immediately reeled in the log line, but we know from engine room survivors that the engines did not go full astern during or immediately after...

One question... To drop a propeller blade was such a common accident those days for an ocean liner? How was that possible if the screws were massive structures?

If it was so common for ships to loose their propeller blades, I bet that the ocean floor is ''filled'' with such items! An apparently, if they do not rust away we will have them for many many years! I wonder, is it still common for modern propellers to loose their blades? Drop your...